The demo has been updated to version 0.0.0.18, which contains lots of small quality of life changes, and the ability to load your save file from the main menu:
Added settings to invert mouse look input
Added version number to the main hud
Added the ability to load save files from the main menu (However, the UI is very placeholder)
Updated the Ore Crusher & Rolling Mill to be a little quieter
Updated blocker conveyor to start in the "Off" position
Updated Hammer shop description to tell you that you can also press "F" to pickup buildings without needing the hammer.
Updated Ore Analyzer to start locked. It's now unlocked with the Hammer from the Coal quest
Updated building placement position to be a little lower
Updated "Clear all physics ore objects" button to NOT clear ore pieces that are inside sorter filter baskets
Updated Hopper's friction, so things will be less likely to spill
Note that saving/loading is still work in progress. I plan to continue updating it over the next few days/weeks. Please share your feedback on Discord or the Steam Forums! We're happy to hear all your thoughts on the game so far :D